Directly suspended droplet microextraction in combination with microvolume UV-vis spectrophotometry for determination of phosphate

被引：36

作者：

Pena-Pereira, Francisco ^{[1
]}

Cabaleiro, Noelia ^{[1
]}

de la Calle, Inmaculada ^{[1
]}

Costas, Marta ^{[1
]}

Gil, Sandra ^{[1
]}

Lavilla, Isela ^{[1
]}

Bendicho, Carlos ^{[1
]}

机构：

[1] Univ Vigo, Fac Quim, Dept Quim Analit & Alimentaria, Area Quim Analit, Vigo 36310, Spain

来源：

TALANTA | 2011年 / 85卷 / 02期

关键词：

Directly suspended droplet microextraction; Microvolume spectrophotometry; Phosphate; Dissolved reactive phosphorus; Preconcentration; LIQUID-LIQUID MICROEXTRACTION; SOLID-PHASE ENRICHMENT; FLOW-INJECTION; MALACHITE GREEN; NANOMOLAR CONCENTRATIONS; TRACE DETERMINATION; SOLVENT-EXTRACTION; SINGLE-DROP; MICRO-SPECTROPHOTOMETRY; NATURAL-WATERS;

D O I：

10.1016/j.talanta.2011.05.032

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A miniaturized methodology for the determination of phosphate in waters has been developed by combining directly suspended droplet microextraction (DSDME) with microvolume spectrophotometry. The method is based on the extraction of the ion pair formed between 12-molybdophosphate and malachite green onto a microdrop of methyl isobutyl ketone and subsequent spectrophotometric determination with no dilution. An enrichment factor of 325 was obtained after 7.5 min of microextraction. The detection limit was 6.1 nM phosphate and the repeatability, expressed as relative standard deviation, was 2.7% (n = 6). The method was successfully applied to the determination of dissolved reactive phosphorus in different freshwater samples. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1100 / 1104

页数：5

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